3Q4 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 197. 



AUGUST 17th, 1854: EVENING. 



Lat. at Sk., 14 C 19' N: Lon. 120 40' E 

 Sun set at ti/i. \I'I\>H. 



( 7h. 30m. 

 Stronger and Diffuse Light at< 8 30 



/ 9 10 



Clouds since last date, until this evening, when the sky was remarkably clear and brilliant. Had a good observa- 

 tion at 7" 30 m : the Light had been distinct 10 or 15 minutes previously, but not sufficiently so to give reliable 

 boundaries. At 7" 30'", and till 8", the Stronger Light was very bright, particularly up to the zigzag line ; but it 

 also was very decided up to its extreme end. As the ecliptic, in these low latitudes, has risen up considerably in 

 the evening, I watched carefully from 7" 30"" to 9", to see whether there were pulsations, in either height or intensity ; 

 but I could not discover any. At 9" 10 m , the Light was still very distinct and decided. In this latitude the stars 

 sink rapidly ; and by 10 h , even Antares had got well down towards the horizon : I thought the upper end of the 

 Stronger Light could still be made out, extending as far as that star (Antares) ; but it was difficult to distinguish it 

 now from the usual glare along the horizon. 



